20013672 has 32 divisors (see below), whose sum is σ = 57182400. Its totient is φ = 5718144.

The previous prime is 20013671. The next prime is 20013689. The reversal of 20013672 is 27631002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20013671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59397 + ... + 59732.

It is an arithmetic number, because the mean of its divisors is an integer number (1786950).

Almost surely, 2^20013672 is an apocalyptic number.

It is an amenable number.

20013672 is an abundant number, since it is smaller than the sum of its proper divisors (37168728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013672 is a wasteful number, since it uses less digits than its factorization.

20013672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119145 (or 119141 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20013672 is about 4473.6642699246. The cubic root of 20013672 is about 271.5036001001.

Adding to 20013672 its reverse (27631002), we get a palindrome (47644674).

The spelling of 20013672 in words is "twenty million, thirteen thousand, six hundred seventy-two".